You’re clearly misunderstanding the relationship and dynamics between women. If a man cornered you and a woman cornered you, you’d have different reactions. Just like you wouldn’t care as much if a woman smacked your bottom as if a man did.

Heterosexual women aren’t the only women in the world. Lesbian and bisexual women exist, so they would react the exact same way if a woman groped them as did a man. 

And women have a tendency to excuse something just because other women are doing it, and there is a pressure to support something because other girls support it. Even Powerpuff girls pointed this out with the Femme Fatale episode where one of her points is “girls have to look out for each other no matter what”, which is bringing up a toxic aspect of female socialization. 

Even in schools, among girls, there is more pressure to conform to the norm than among boys. Female bullies are less punished than male bullies also for the same reason, because women are taught to inherently trust other women even though this is a very dangerous thing to teach.